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Document the mmap requirement for flatnode files

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Fixes #877.
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Sarah Hoffmann
2018-11-17 15:37:46 +01:00
parent 85f32d6c0f
commit b15441df1c
1 changed files with 9 additions and 0 deletions
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docs/admin/Faq.md
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@@ -71,6 +71,15 @@ and recompile (`cmake .. && make`).
Reinstall the nominatim functions with `setup.php --create--functions`
and check for any errors, e.g. a missing `nominatim.so` file.
### I see the error: "ERROR: mmap (remap) failed"
This may be a simple out-of-memory error. Try reducing the memory used
for `--osm2pgsql-cache`. Also make sure that overcommitting memory is
allowed: `cat /proc/sys/vm/overcommit_memory` should print 0 or 1.
If you are using a flatnode file, then it may also be that the underlying
filesystem does not fully support 'mmap'. A notable candidate is virtualbox's
vboxfs.
### The website shows: "Could not get word tokens"